Stkom



(No Model.)

G. F. SELLSTROM. SAW.

No. 411,475. Patented Sept. 24, 1889.

WIZWESSES [ME/V1072 a wwx 2 6 mm,

N. PETERS, Photn-Lilho m hnr. Washington. D. c.

UNITED STATES PATENT OFFICE.

GUSTAF FABIAN SELLSTROM, OF JAMESTOVVN, NEW YORK.

SAW.

SPECIFICATION forming part of Letters Patent No. 411,475, dated September 24, 1889.

Application filed February 21, 1889. Serial No. 300,712. (No model.)

I invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form apart of this specification.

The object of my invention is to provide a more efficient means of straining a saw and holding the same in a frame, and is more particularly adapted to butchers saws and those having similar frames.

The improvements consist in firmly securing across each end of the saw-blade metal pieces to engage holes in frame and connections, and also a yoke that will admit of different widths of sawblade, all of which will be fully set forth in this specification and the accompanying drawings, in Which- Figure 1 is a View of saw having my improvements. Fig. 2 is a sectional view of one of the fasteners, showing portion of sawblade. Fig. 3 is a plan view of Fig. 2. Fig. 4 is a detail of one end of saw-blade. Fig. 5 is a sectional view on line y y, Fig. 3.

A in the drawings represents the frame of a saw, which may be of any suitable material or desired general form, the frame being made at the handle end to receive the yoke D, which should be either oblong or other desired shape on the shank that passes through the frame in order to hold it from turning. This bolt has a large oval oblong head, having a round hole E, extending from its bottom to near its top, as shown in Fig. 2, and is slotted to receive the blade of the saw. The opposite end of the frame A has the same kind of a hole as this yoke, and is slotted to receive the blade, as shown. The ends of the saw-b1ade I finish by sawing again in a round brass rod or other suitable metal and by brazing securely. It would answer to upset the ends of blade or to lap a flat brass piece around the ends and braze them on, but I prefer the round rod, as it makes a better fit for the round holes in frame and connection.

The frame at the farthest end could be just slotted for the blade and let the projection on saw go outside the frame, if frame and projection were placed at a proper angle, and this would be a little cheaper, but not as good.

In the hole of yoke and saw-frame I sometimes use the washers a a, as shown, the object being to adjust different widths of sawblades to the same frame, and have a rest for the blade to press against and not to depend entirely on the tension to the blade from moving back. The advantages of these improvements are that I have the strength of the whole width of the blade, and the tension is alike the whole width, and this enables me to use wide blades and hold them much stiffer than when held in the common way. The blades are readily adjusted, and any desired width can be used in the same frame.

Having described my invention, I claim- 1. In meat or similar saws, the blade having raised projections across the width at each end, and a frame having ahole at one end of sufficient depth to receive said projections on the blade, in combination with an ad justable yokehaving suitable means for securing same in frame and provided with similar hole to receive the projection on the other end of saw, said holes in frame and yoke being provided with suitable washers or caps to form a back support to saw-blades of different widths, substantially as shown, and for the purpose set forth.

2. In meat or similar saws, the blade having raised projections across the width at each end, and a frame having a hole at one end of sufficient depth to receive said projections on the blade,in combination with an adjusta ble yoke having suitable means for securing the same in frame, and provided with similar hole to receive the projection on the other end of saw-blade, said frame and yoke being provided with suitable means to form a back support for saws of dilferent widths, substantially as shown, and for the purpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

GUSTAF FABIAN SELLSTROM.

IVitnesses:

MILO HARRIS, Orro OARLsoN. 

